I was also impressed by how much trans visibility there was at Pride. There was a whole family marching in front of us in support of their daughter, with everyone wearing Trans Pride flags as capes.
Things to watch out for in Barcelona
Avoid, avoid, avoid.
Airports: be careful to check which airport your flight lands at before you book. The main airport, Barcelona International Airport (or El Prat, airport code: BCN), is only 13 km southwest of the city centre and is the best option. Some budget airlines like Ryan Air don’t always fly to this airport but use Girona (airport code: GRO) or Reus (airport code: REU), both over 100km from the city and can add significantly to the time and cost of your trip.
Pickpockets: Barcelona is possibly the pickpocket capital of the world - and spending a day of your holiday at the police station is not much fun. So make sure you bring a day bag with inaccessible pockets! My recent trip saw me targeted three times by thieves who managed to open my bags in public.
Las Rambla: stretching from Plaça de Catalunya down to the sea, this is tourist central and should be avoided. It is swarming with people and terrible microwaved paella cafes, making it a pretty horrible experience of the capital and total pickpocket central.